Sawmill setwork



May l2,4 1931. G. TANNER 1,804,715

' SAWMILL SETWORK Filed March 28, 1929 4 Sheets-Sheet l- Q60??? Tr Inventor I Attorney May l2, *1931,

G. TANNER 1,804,716

SAWMILL SETWORK Filed March 28, 1929 Inventor Georye Tanner fior ne y Mayk 12, 1931*. G, TANNER 1,804,716

SAWMILL SETWORK George 'Th1/111?"` 'Inventor May 12, 1931. G. TANNER 11,804,716

SAWMILL SETWORK Filed March 28, 1929 4 Sheets-Sheet 4 @sanne-77a HNA-A7 Eg.. .Z Inventor By v A Homey Patented May 12, 193.1

unirse eiseres GEORGE rennen, kotr sAWMrLL Appli-cation filed March 28,

My present invention relates to improve ments in saW mill set Works as applied to the transversely reciprocable knees of the reciprocable saw mill carriage employed in san7` 5 ing logs. rlhe primary object of the invention is to improve the construction and operation of the knees and related parts for the purpose of eliminating excess friction and consequent binding and to insure a smooth action of the moving parts; to provide resilient mechanical means and also pneumatic means for' yabsorbing and cushioning shocks due to the starting and stopping of reciprocating parts; to insure greater accuracy in cutting the'log together `with economy in time and labor; to provide means for taking up or compensating for Wear especially in the dogging mechanism; and thus increase the efficiency of the operating parts for the production of a better grade of material.

As is Well known in the'trade, the backward and forward movement of the reciprof eating carriage tends to cause the toplieavy knees to lean in the direction opposite to that of the travel of the carriage, and this leaning or tilting, produces excessive 'friction and consequent'bindingof parts. By the utilization of thedevices of my invention, anti-fric tion means are employed for elin'iinating the binding oi' the transversely movable knees,

thus facilitating 'the setting and receding of the knees. Y I' A pneumatic mechanism is employed yfor Ycushioning the movement of th-e knees in their setting and receding movements to eliminate lostmotion or slack movements in the knees, the rack and pinion mechanism and the taperingdevices. f

A resilient mechanical cushioning device is utilized in connection ivitlithe doggi'ng mechanism; and in connection With the dogs l utilize devices for taking up Wea-r to insureA at all times a compact arrangement of the operating parts Wherebynthe log is rigidly held in position in order that the log may be sawed Withaccuracy.

The invention .consists in certain novel combinations and arrangement of parts as Will Y hereinafter be more` fully set' `ierth and claimed- In thev accompanying drawings I' View at line lle-jlljoi Figure 9."

Y tenant' pl'r'vsical embodiment of my invention in connection with arWell known type of knees,

wherein the parts are combined and arranged according to the best mode l have thus far de# visedl for the practical application of the principles of myinvention.

Figure l is a vieivi'n eide elevation of one of the knees projected to extreme forward position transversely of the saw mill carriage, di, which is shoivn in end elevation, showing the clogging mechanism in dotted lines, and indicating' the positionvof the saw.

Figure Qis an enlarged, vertical, sectional, detail View of a resilient bumper for the dogging mechanism, and Figure 3 isa sectional view vat line 3--3 of Figure 2.

Figure l is a detail side view at the front end of the backing oil or receding cylinder showing the piston stem connected with the :1, knee, and Figure 5 is a top plan View of the parts inFig. 4. Figure 6 is a longitudinal sectional view on the backing off or receding cylinder and pistonftherein. f Y

Figure 7 is an enlarged View in side ele- 75 vationo' one of the anti-frictionr carriages for the knee, one ofV the carriages being located at' eachside of the knee. Y

Figure 8 is a; vertical, transverse sectional vieW at line `8--8 of Figure 7 showing also, at so the left, the carriage-pin and its roller in the taper slot of the knee.

Figure 9vis an enlarged detail elevation at the front of a knee rshowing the-clogging mechanism, andFigure 10 is a face view oit 85 the mechanism as seen from the right in Fig` ure 9 with parts omitted for convenience of illustration. Figure ll isa cross sectienal Figure 12 is a face view at thefront lower eo portion of the knee.` Figures 13 and 14 are enlarged plan views of Wear-plates used with the lower dog for guiding the movement of the latter and to` compensate for or take upwearof the parts. Figurel is a vertical longitudinal section through the knee of Figure `l showingthe dog holder and related parts. V ,Figurelais a faceiview ofthedog helder of Figure 15. f f

Figure I7 is a perspective view, from the rear, of the dog holder, with operating parts omitted.

In order that the general arrangement of parts may be readily understood I have shown in Figure l a pair of rails l, l, over which the wheels 2, 2, of the carriage 3 roll, as the carriage reciprocatesin the usual manner. he saw is indicated at 4, and the logs are carried on the transversely disposed headblocks 5, a plurality of which are used'at suitable intervals along the sav7 mill carriage.

In Figure l the usual rack 6pin7, operat` ing shaft 8, and pinion 9 are indicated, for use in advancing and receding the several knees indicated as a whole by the number l0, it being understood that the knees are reciprocated transversely of the saw mill carriage between the cutting or sawing operationsas required.

As the knee reciprocates, the rack rolls on the pinion and the knee, under ordinary conditions, slides across the top of the head block. To relieve the excessive friction on these parts, and to prevent the knee from tilting' (as the saw mill carriage moves) and consequent binding, I utilize pin 7, and slots ll in the opposite side-walls of the knee, for

. anti-friction rollers l2.

circle the pin,.nuts 16 on the upper threaded ends of the U-bolts and pads or plates 17 on Y theY tops of the carriages, the carriages support the pin 7 and it will be apparent that the vertical slots 14 of the carriage permit radjustment of the pin ends in the carriages.

At ends of each carriage a roller as 18 is our naled by the use of Journal pins 19 in' the walls of the carriage, and these rollers travel over the complementary, spaced track plates 20 on the top ofthe head block. The carriages at the sides of the knee are thus adapted to be adjusted withrelation to the knee and track plates so that the rollers 12 in the taper slots and the rollers 18 on the track plates will engage their frictional surfaces in such manner as to retain the knee against lateral movement or wobbling, and yet permit the. required freedom of rolling movement on the part of the knee as it is advanced and receded with relation to the log or the head block.

The carriage pinralso has pivotally connect-ed therewith the side links 21 that extend rearwardly to the rocker arms 22 of the usual taper set cylinder 23.

The usual backing off or receding mechanism that pulls the knee to the right in Figure l, and normally holds the knee in receded position, as well as performing the usual functions of a pneumatic shock absorber, is indicated by the compressed air or steam cylinoer 24 that is rigidly attached at 25 to the headblock. Within the cylinder, the piston 26 is'adapted to reciprocate, and its stem 27 projects forward alongside the knee, and connected to the latter by means of a coupling head 2S on the coupling sleeve or collar 29 that is clamped on vthe horizontally projecting hub 30 of the knee, by means of bolts 3l as seen, in Figures 4t and 5. Compressed air is supplied to the cylinder near its front end at 32, and near the rear end of the cylinder an inwardly opening, automatic check valve 33 is provided. At ill a pressure relief valve is connecte l at the rear end of the cylinder. The admission of air at the inlet alve 32 is under control of the man who rides the saw mili carriage, andwhen applied, the air pressure pulls or recedes the knee to the right in Figure l, thus backingr it off from the log, or from the position of Figure l, in connection with the rack and pinion mechanism. As the sawing proceeds and the log is frequentlyV turned, the backing off mechanism provides a pneumatic cushion to absorb shocks from the startingand stopping of the movements, and also to stabilize the knee in its different positions. y

The clogging mechanism carried within the knee includes an upper dog 35 and a lower dog 36, the latter to be used onlogs of smaller diameter than those for which the upper dog is adapted.

The dogsare carried on a dog holder 37 that is vertically slidable within the knee on the guide bar 37 and they are adapted to be projected through the slot in the front of the knee between the two face plates 38.

At the rear sidn of its upper end the dog holder is provided with a bracket-collar 39 that is fitted over and fastened on the upper end ofthe plunger stem 40 which extends into the pneumatic cylinder Alll of the clogging mechanism. I'Vithin the cylinder suitable actuating means are employed under air control, and as shown in Figure l5 the cylinder 4l is supported on a cushioned bracket 42 that is pivoted to the guide bar or dog bar 37', and it is cushioned by its bolt 79 and spring 8O on the bolt, the head 'of the bolt sliding on the plate 8l of theknee. The doe' holder is raised and lowered to operate the dogs, and anti-friction rollers 43 are carried by the holder forfrictional, rolling` Contact with the rear edges of the face plat-es ofthe knee. A I As best seen in Figuref) the upper dog spring is anchored to the holder t de.

n on the holder.

` tane-es from the opening.

' Leo-'ima is supported in the holder by the pivot pin iv-l, and the dog has a slot 45 which permits a slight relative movement the dog on its 1wivot when the dog is forced into the log. .or they upper end ofthe pivoted dog a :pring i6 is attached andthe other end ot this e `Above the spring on the extreme lend of the dog is provided a cam shaped stop 48 which coacts with a cam shaped stop i9 that is'iixed rlhe spring` normally holds the point of the dog extended with the stops, and it will be apparent that as the slotted dog moves upwardly on its pivot pin as the dog engagesthe log, the action of the cam head and cam causes the point oi' 'the dogI to swing inwardly toward the knee, thus swinging or i'iulling the log` inward and tightagainst the face plates ot' the knee. ln tl is manner the logl is rigidly Vheld against movement and in close trictional contact with the knee so that the saw ma7 make an accurate eut in the log. vWhen the dog is released from the log, the spring is free to pull the dog down to normal position in Figure 9.

The lower dog 36 is also adapted to draw or turn inwardly the log toward and against thev knee, and its hooked point' it penetrates the log, coacts with the upward give of the curved dog, for this purpose, The curved or arc-shaped dog 86 slices between and is guided by wear blocks, threeoi1 which are designated as 50, and the fourth as 53, and the li'our blocks are arranged in pairs at the opposite curved sides of the dog, within the doe' holder. rrlfhe block.' 50 which have angular sides are here shown as rectangular, but other shapes may be used, and. each block has an openingl eccentric to or oil]- irom the center of the block in order that `various edges are located at differing `dis- The openings in the blocks arc slipped over pins 52 oi' the holder, spaced at opposite sides of the 'l'hus as the edges of the dogs, or the edges ot the guide blocks, wear, the blocks -may be rei moved and replaced with a fresh guide enge i'or contact with the curved edges of. the d 'f 557 and these fresh edges compensate 'for or tane up the wea r, and maintain the dogs in proper condition to prevent loose movement or lateral give as they slide in their blocks. A t the concave edge ofthe dog a heart-shaped block 53 is located, and its offset or eccentric hole all Ets, the block over the pin 55 in the holder.

This heartshaped block with vconvex curved iaees complementary to the concave Vface et the dog, may also be turned over on its pin to bring a tre-sh bearing edge against the dog to take up wear between the dog and block.

A head or stop 56 is provided at the top o' the dog to overhang one oiQ the guide blocks 50 and limit the downward movement of the dog. Y

A guide rod 57 is hinged to the lower dog gages the logy thev dog is forced upwarcly against the compression of the spring, and th-e reoracting movement of the` arc-shaped dog between its guide blocks causes the hookedend to hold the log against the tace of the knee. l

The dog holder and guide bar 37 are held against loose lateral movement, by means of an air cushion, and also by a spring which includ-es a resilient blade 6l thati'ri "tionallv engages the edge of the bracket 42, and is adjustable to take up wear on the operating parts of the dog holder and dog bar caused by the operation of the clogging mechanism. As seen in Figures 2 and 3 the spring cushion device is located at the back of the knee, and is suspended from a portion of the knee as a support by means of the upper hooked end 62 that overhangs the knee-wall. The hooked end is slottedat 63 and liesllat against the knee, and stud bolt 64 threaded into the knee, extends through the slot of the cushion, with lock nuts 65 on the bolt for clamping the slotted benty end of the cushion rigidly lagainst theknee. The cushion may be vertically adjusted when thelock nuts 55 are loosened, and this adjustment may be secured by the use of a setboltinthe top oil-thc cushion blade, which bolt bears Vdown on the top of the knee-wall and issecur-ed by lock nut 67. At its lower free end the resilient blade of thek cushion is provided with a pair of side links 68l that are pivotally connected with the cushion by means ofthe bolt 69 and the clamp nuts 70. By means of the pivot bolt 716 the upper rear ends of tlieselinks are hung onthel knee walls asa support. and it will be apparent that the resilient cushion is thus adapted to be adjusted for frictional Contact with the bracket `to Ahold the latter against any lost motionfand yet permit it to give slightly under strains. i

The dog holder is also held againstloose `movement., laterally by means of the 'conlbined air cushion in the cylinder '.71ct and its piston rod 'lfand the bumper `61 shown in Figure-s 2 and 3. yThe cylinder 'lis supported in a frame 78 on the outside of the knee wall and rod 7l isV connected to the long` Harm of a bell cranklever 72, which is pivoted at 73 on the-knee l0, the short arm of the lever Listing-the-parts as follows: Assuming that the points of the dogs (35 and 36) are u, ad

tobe set so that they will recede toward and to within 1/2 inch of the faceof the knee with a cushioned stop to preventv wear andrtearl on the parts, the nut 76 on the rod 71 is first loosened, and the rod pushed downwardly until its piston in cylinder 71a contacts with the bottom of the cylinder. The threaded end of the piston rod is then turned in the pivotshackle 7 7 of the bell crank 72 until, through the action of the bell cranks, the dog holder advances the points of the dogs toabout l@ inch beyond the face of thel plate 38. The lock nut 76 on the threaded end of the piston rod is then tightened on the shackle.

The adjustment of the piston in cylinder 71a provides a space in thecylinder below its piston so that after the dogs have been projected to engage a log land are pulling the log toward plate 38 and the part Ll2 engages the bumper 6l, the latter resists further movement, but, as the impact is liable to break the arms 68.the air cus iion in the cylindex-"71a functions to cushion the impact and prevent undue strain on the links 68.

Various parts of the set works are illustrated for convenience of illustration and description, and it will be understood that the operating parts of the mechanisms are under control of the setter or man riding on the carriage of the saw mill. The knee is advanced and receded through the action of the rack 6 and pinion 9 on the shaft 8, the latter being controlled in its movements by pneumatically operating parts not shown. As the reciprocating movements of the knee are usually abrupt, these movements are cushioned and the shocks absorbed by the pneumatically operating receding mechanism including the stem 27, cylinder 24 and other parts.

The knees are receded from the position in Figure l in order that the log may be placed on the carriage, and the knees are then advanced to the log, after which the clogging mechanism, under control of the setter, is

operated to engage one or the other of the two dogs with the log. The log` is manipulated by a Adevice termed a nigger and is thereby clamped against the knees and held in rigid position by the dogging mechanism while the cutting operations are proceeding.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is 1. The combination with a reciprocable knee having spaced slotted side walls, operating means therefor, and a support, a pin disposed transversely of the knee,'and rollers on said pin movable in the slots of the knee, of a carriage at each Side 0f the knee fer'supf pmrting said pin, and antiffrietion devices im thcarrag- 2. The combination wit-h a reciprocable knee having slots at its opposite sides, a transversely arranged pin having rollers thereon in the slots, and operating means for" knee havimr s aced walls and slots therein a pin having rollers in said slots and' operating mechanism connected with the pin, of a support, carriages supporting the opposite ends of said pin and bearing rollers on the carriages adapted to travel on the support, and means for adjusting the carriages relatively to the pin for equalizing the load of the knee on the carriages.

Ll. The combination with a reciprocable knee, operating means therefor, a pin disposed transversely of the knee, and a support, of a pair of carriages movable on the support and adapted to support the ends of the pin, and means for adjusting the carriages relatively to the pin for equalizing the loadkrof the'knee on the carriages.

5. The combination with a reciprocable knee having slotted side walls, a transversely disposed pin mounted in said walls, of a carriage having a bearing slot for the pin, and means for adjusting and supporting the pin in the slot. y

6. The combination with a reciprocable knee having slotted side walls anda pin mounted in said walls, of a pair of carriages each having avertical bearing slot for the pin, suspending means on the carriage for supporting the pin, means for adjusting the suspending means and means for retaining the suspending means in adjusted position.

7. The combination with a dog-holder and a knee, of a resilient cushion ior the holder comprising a blade located to the rear of the dog-holder for contact therewith, means for moving the dog-holder toward and from the blade, means for suspending the blade on the knee, and means f for holding the blade in suspended position.

8. The combination with a dog-holder and knee, of a resilient knee for contact with the holder, adjustable `means for supporting the bumper from the knee and means for fastening the bumper in adjusted position, and supporting linkspivoted to the free end of the bumper and loosely mounted on the knee to permit play upon engagement ot' the dogholder with the cushion.

In testimony whereof I' affix -my signature.

.GEORGE TANN'ER. 

